Improvement in machine for grooving lead-pencil blanks



P. HUFELAND.

MAGHIN'E FOR GROOVING BLANKS FOR LEAD PENUILS. N0. 103,'746. PatentedMay 31. 1870.

PHILIP nUF LAa-D,

or new YORK, N. Y.

Letters Patent No. 103,746, dated May 31, 1870.

IMPROVEMENT IN MACHINE FOR GROQVING- LEAD-PENCIL BLANKS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, PHILIP HU'FELAND, of the city, county, and State ofNew York, have invented a new and improved Machine for Grooving Blanksfor Lead-Pencils, &c.; and I do hereby declare the following to be afull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference being had to theaccompanying drawing forming part of this specification, in whichdrawing-- Figure 1 represents a plan or top view of this invention.

Figure 2 is a sectional side elevation of the same.

Figure 3 is a partial transverse section of the same.

Similar. letters indicate corresponding parts.

This invention relates to a machine for grooving the blanks oflead-pencils. v

These blanks consist of thin boards, each of the length of a pencil, andusually wide enough for six pencils, and they are exposed to the actionof a revolving cutter, which produces in their surface six squaregrooves, just large enough to receive the leads.

.The subject-matter of this application consists in the combination andarrangement of certain parts hereinafter to bemore fully described.

The blanks are fed to the grooving-cutter automatically, by means of acog-wheel mounted on a shaft, to which a revolving motion is imparted bya pulley held on it by a friction-clutch, in such a manner that, if fromsome cause the pusher meets with 'amundue'resistance, the pulley on thepusher-shaft slips,-and injury to the machinery is avoided.

After having advanced the required distance, the pusher is pulled backto its original position by a weight.

The grooving-cutter is protected by a hinged cap, and on thecutter-shaftis mounted a fan-blower, inclosed in a case in such a mannerthat by its action the dust created by the action of thegrooving-cutteris drawn off and expelled through a suitable tube,thereby saving the workmen from being annoyed by such dust.

In the drawing- The letter A designates a' frame which forms thebefiarings for the working parts of the grooving-mac me.

From one side of this frame projects a platform, B, on which theblocksto be grooved are fed to the cutover the platform B, and which isopen at the bottom, so that one of the blanks after the other canbepushed out from below.

This operation is effected by means of a pusher, F, which rests upon theplatform B, and is provided with cogs a at its under surface, to gearinto a segmental cog-wheel, b, which is mounted on a shaft, 0.

On this shaft is placed loosely a pulley, d, which is pressed up, bymeans of a spring, 6, against a fric tion-disk, f, so that a beltstretched oversaid pulley will impart to the shaft a revolving motion,and the pusher will be carried-forward in the direction of the arrowmarked thereon in fig..2; but if the pusher, from some cause, meets withan undue resistance, the

pulley (I will slip on its shaft, and injury to the mechanism will beavoided;

By increasing or decreasiu g the tensionof the spring 0 the maximumpressure of the pusher can be determined. \Vhen the pusher has advancedthe desired distance, it is released by the segmental wheel jb, andpulled back by a weight, 9, attached to it, as shown in fig. 2, whilethe-shaft c continues to revolve, and" serves to -carry the pusherforward again on -its next revolution. I

A stop, 7t, projecting from the frame A, prevents the pusher from beingdrawn back beyond the required position.

After leaving the hopper, each blank is exposed to the action ofpressing-rollers 1', each of which is -monnted onasepapate slide, andsubjected to the action of its own spring, and which acts on the outeredge of the blank, serving to keep the inner edge thereof up against thegauge j, which rises from the frame A, best seen in fig. 3. of thedrawing.

These pressing-rollers are necessary, because the blanks are sometimesnot exactly of uniform width, and sometimes one edge of a blank-which,in that case, is kept outward-is rugged, so that, without thepressing-rollerssuch blank would not be held tight while being exposedto the action of the groovingcutter, and the grooves would not become asuniform as required. But, by the action of the pressing-rollers, theinner edges of each blank are kept close up to the gauge, and neither-bfthe blanks is allowed to become displaced while passing through underthe grooving-cutter.

Suitable feed-rollers Zt'k serve to push the blanks along between thegauge and the pressing-rollers, and also under the grooving-cutter.

On the cutter-shaft D is mounted a fan-blower, G, which is inclosed in acase, H, the top of which is hinged, so that it can be turned back,and'which communicates with the' interior of 'a'cap,.I, that covers thegrooving-cutter, so that, by the action of the fan, all the dust createdby the action of the cutter is sucked in and expelled through thedischarge-pipe J The cap I is hirigecl, so that'it can be turned back togive access to the cutter.

What I claim as new, and desire to secure by Letters Patent, isv 1. Thepressure-roller 2', gauge j, and cutter 0, when arranged in relation toeach other and operating in connection with the pusher F,friction-pulley (I, and hopper E, substantially as herein shownanddescribed.

2. The arrangement of the case H and cap I with" the grooving-critterand fan-blower, mounted on one and the sameshaft, substantially asdescribed.

.PIIILIP HUFELAN'D.

Witnesses W. HAUFF, E. F. KASTENHUBER.

